Repairing and Enhancing Permeability Technology and Equipment of Gas Drainage Borehole
SU Xianbo
LIU Xiao
MA Baoan
PEI Gang
FENG Wenjun
Abstract：According to a serious reduction problem of gas drainage production caused by the gas drainage borehole stability lost and jammed occurred easily,a hydraulic operation machined of the gas drainage borehole was researched and developmentm,a high pressure, varied flow and continuous borehole repair technical system was formed with a 16 mm outer diameter continuous wrapped steel tube and based on a high pressure water jet as core.The high pressure water jet caused by the hydraulic operation machine of the gas drainage borehole was applied to the hydraulic borehole flushing and jam removing and the hydraulic jet fracturing and permeability improvement of the gas drainage borehole.Thus a double permeability goal of the pressure releasing and fracturing was reached,the production of the available gas drainage boreholes could be restored and new boreholes construction could be eliminated.The technology applied to Daping Mine of Zhengzhou Coal Industry Group showed that after the borehole repaired and the permeability improved,the pure volume of the gas drainage could be increased over 800%.
Keywords：gas extractiondrilling reparationhigh pressure water jetgas extraction borehole hydraulic machine
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 58-60,30 )